Add empty states to Your Works > Groups page

What does this MR do and why?

Add empty states on Your Works > Groups page

References

Closes #502489 (closed)

Screenshots or screen recordings

Scenario	Screenshot
User has groups, but tab has no items
User has groups
User has groups, but filter has no match

How to set up and validate locally

Setup

1. Enable the your_work_groups_vue feature flag in the rails console.

Tab with no groups

1. Sign in as a user with no groups.
2. Go to /dashboard/groups.

User has groups, but filter has no match

1. Sign in as a user with groups.
2. Go to /dashboard/groups.
3. Type in a random text in the search bar that won't match any groups.

MR acceptance checklist

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